Also referred to as MPA™, Maximum Power Available or Max Power Available, it is a measure of the maximal power an athlete can generate at a given moment during exercise.  As an athlete fatigues, MPA declines.  As they recover, it increases. The point where the athlete’s power is equal to MPA is defined as a point-of-failure or maximal effort.  It is calculated by using power data together with an athlete’s Fitness Signature to calculate the athlete’s ability to generate power at any given point in time.